34
11.7.16 Pump test run (4.2.5)
Fig. 51 Pump test run
Description
This function is primarily used in situations where the forced
pump changeover is deactivated, and/or if the Control MPC is set
to operating mode Stop, for instance in a period when the system
is not needed.
In such situations, it is important to test the pumps regularly.
The function ensures that
• pumps do not seize up during a long standstill due to deposits
from the pumped liquid.
• the pumped liquid does not decay in the pump.
• trapped air is removed from the pump.
The pumps start automatically one by one and run for five
seconds.
Setting range
• Not used.
• Once every 24 hours.
• Once every 48 hours.
• Once a week.
Setting via control panel
1. Mark the Settings menu with .
2. Mark Pump cascade control with or , and press
.
3. Mark Pump test run with or , and press .
4. Select the interval with or .
5. Activate the function with .
Factory setting
The setting is done in the start-up wizard and depends on the
application.
11.7.17 Pilot pump (4.2.6)
Fig. 52 Pilot pump
Description
The function controls a pilot pump via a digital output. The pilot
pump takes over the operation from the main pumps in periods
when the consumption is so small that the stop function of the
main pumps is activated. See section 11.7.23 Stop function
(4.3.1).
Via a digital input, the operational state of the pilot pump is
monitored, i.e. whether it is operational or in a fault condition.
The purpose is to
• save energy
• reduce the number of operating hours of the main pumps.
If the pilot pump cannot keep the pressure by itself, one or more
main pumps are started. If only one main pump is started and
runs on/off operation, the pilot pump remains cut in. If one or
more main pumps run continuously, the pilot pump is cut out.
Setting range
• See section 11.7.31 Digital outputs (4.3.9).
• See section 11.7.26 Digital inputs (4.3.7).
Setting via control panel
1. Mark the Settings menu with .
2. Mark Pump cascade control with or , and press
.
3. Mark Pilot pump with or , and press .
4. Mark Go to setting of digital output with or , and
press .
5. Select a digital output with or , and press .
6. Mark Pilot pump control with or , and save with
.
7. Return by pressing twice.
8. Mark Go to setting of digital input with or , and
press .
9. Select a digital input or , and press .
10.Mark Pilot pump fault with or , and save with .
Factory setting
The function is deactivated.
TM03 2364 4607
Pumps in the operating mode Manual are not
included in the test run. If there is an alarm, the
test run will not be carried out.
Pilot pumps are included in the pump test run.
TM03 8963 4807
Set the setpoint of the pilot pump to this value:
H
set
+ 1/2 on/off band + 8 metres.
If the setpoint of the main pumps is changed, the
setpoint of the pilot pump must be changed too.
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